Lighting Moment 12, Cat 360

In class the other day, my professor used the projector and after he was done with it three spot of light that looked like a ven diagram continued to shine on the board. The circle on top was a light green, like keylime, but a bit more vibrant. The two on the bottom were a light blue and in between them the colors mixed so they faded into each other.

This could be recreated on the floor, on the cyc and/or dancers, or a special screen. Any of these options could be recreated in a variety of different sizes and one could use any of the lights to make them; which you used would simply depend on the size and how concentrated or diffused you want the light to be.
If I ever used this design I would want to use it on the floor and make three large pools of lights. People lower to the level of the stage floor might not be able to see the effect as well, but I would hope the color change would show up on the dancers when they passed through/danced in the "diagram."